Killing zombies is always a fun thing, as Valve Corporation knows with its release of "Left 4 Dead 2." Similar to the prequal, players must work together with up to three friends or AI partners to combat the zombie apocalypse. The story takes place mostly in the South in areas such as New Orleans and is spread across five separate campaigns. There are also four new survivors, each with a unique story. The AI "Director" returns and is more intelligent this time around, changing such things as the weather, level layout and enemies. The game is touting its ability to never be the same experience twice. Melee weapons are new and include a frying pan and a chainsaw, a classic zombie-killing staple. Prepare to be bitten on Nov. 17 when "Left 4 Dead 2" comes to Xbox 360 and PC.